Simulative and experimental researches of the pattern in Belousov-Zhabotinsky oscillation reaction

According to the two-dimensional Tyson model based on FKN mechanism,we study the forming process of target wave and spiral wave by using the differential method.It is found from our simulation that there is a defect in the center of spiral waves,which dominates the dynamics of spiral waves.In experiments,a spiral pair is initiated by cutting out a target wave.The single spiral wave and broken spiral wave are also observed.The experimental results are in agreement with the simulations.The Belousov-Zhabotinsky reaction should be a part of nonlinear experiment course in order to enrich the experiments of spatio-temporal dynamics.